Gasser, Jürg ; Hoferichter, Martin ; Leutwyler, Heinrich ; Rusetsky, Akaki (2022)
Cottingham formula and nucleon polarisabilities.
In: The European Physical Journal C, 2015, 75 (8)
doi: 10.26083/tuprints-00012824
Article, Secondary publication, Publisher's Version
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| Item Type: | Article |
|---|---|
| Type of entry: | Secondary publication |
| Title: | Cottingham formula and nucleon polarisabilities |
| Language: | English |
| Date: | 2022 |
| Place of Publication: | Darmstadt |
| Year of primary publication: | 2015 |
| Publisher: | Springer |
| Journal or Publication Title: | The European Physical Journal C |
| Volume of the journal: | 75 |
| Issue Number: | 8 |
| Collation: | 28 Seiten |
| DOI: | 10.26083/tuprints-00012824 |
| Corresponding Links: | |
| Origin: | Secondary publication |
| Abstract: | The difference between the electromagnetic selfenergies of proton and neutron can be calculated with the Cottingham formula, which expresses the self-energies as an integral over the electroproduction cross sections – provided the nucleon matrix elements of the current commutator do not contain a fixed pole. We show that, under the same proviso, the subtraction function occurring in the dispersive representation of the virtual Compton forward scattering amplitude is determined by the cross sections. The representation in particular leads to a parameter-free sum rule for the nucleon polarisabilities. We evaluate the sum rule for the difference between the electric polarisabilities of proton and neutron by means of the available parameterisations of the data and compare the result with experiment. |
| Status: | Publisher's Version |
| URN: | urn:nbn:de:tuda-tuprints-128244 |
| Additional Information: | Link zum Erratum: urn:nbn:de:tuda-tuprints-208000 |
| Classification DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Divisions: | 05 Department of Physics > Institute of Nuclear Physics |
| Date Deposited: | 02 Mar 2022 09:41 |
| Last Modified: | 23 Feb 2023 07:07 |
| URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/12824 |
| PPN: | 505226111 |
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